326 Boraginaceae 
EE. Nutlets stipitate. W. 
A. stipitata Gr. 
AA. Corolla 2—4 mm. wide; annual. 
F. Nutlets somewhat bristly or prickly. U. E. (Apparently A. echinoglochin.) 
A. subglochidiata Pip. 
FF. Nutlets not bristly nor prickly. 
G. Racemes bracted thruout, the lower bracts leafy. 
H. Scar of the nutlets narrowly linear. E. 
A. cusickii Gr. 
HH. Scar of the nutlets ovate. W. (Apparently A. bracteata. ) 
A. plebia Gr. 
GG. Racemes bractless or bracted only at base. 
I. Nutlets keeled on both sides, with ovate-oblong scar. W. 
A. californica Gr. 
II. Nutlets keeled ventrally but not or hardly so dorsally. 
J. Scar of the nutlets roundish-triangular. E.. 
A. hispidula Gr. 
JJ. Scar of the nutlets linear. E. 
A. jucundum Pip. 
EREMOCARYA 
Annual, small, hirsute-canescent; root containing deep purple stain. Leaves chiefly 
basal; in ours linear, 4—8 mm. long. Flowers in dense leafy-bracted paired racemes, 
small, white; pedicels persistent. Calyx-segments veinless, not bristly-hispid. Corolla 
hardly 2 mm. high (ours). Style enlarged in fruit, persistent. Nutlets neither margined 
nor carinate, erect, attached by their whole length; gynobase slender, columnar. (Gk. 
eremos=solitary, karyon—=a nut. Why?) E. 
E. micrantha Gr. 
, PIPTOCALYX 
Annual, small, 2.5—10 cm. high (ours), dichotomously branched; root giving a 
deep purple stain. Leaves in ours linear to spatulate, 6—12 mm. long. Flowers small, 
white, sessile in the forks of the stems or in the leaf-axils. Calyx hispid (ours), the lower 
portion persistent as a membranous ring in fruit. Corolla tube not exceeding the calyx; 
throat naked, open; limb about 2 mm. wide (ours). Stamens included. Nutlets 4, 
rather distinctly margined, attached by their whole length (ours). (Gk. piptein—to 
fall, +-calyx; the upper part of the calyx is deciduous.) FE. 
P, circumscissus Torr. 
PLAGIOBOTHRYS POP-CORN FLOWER 
Annual, mostly soft-pubescent. Leaves largely in a basal tuft. Flowers small, 
white, in racemes; racemes circinate, often in 2’s or 3’s. Calyx closed to spreading, 
somewhat enlarged in fruit, persistent or the upper part deciduous. Corolla short: throat 
conspicuously appendaged. Nutlets broadly ovate and 3-angled, incurved, keeled on 
both sides near the apex, the back usually with irregular transverse wrinkles, attached by 
the middle of the ventral face to a spherical or conical projection, often only 1—2 matur- 
ing. (Gk. plagios=oblique, bothros=a trench: probably referring to the scar on the 
nutlet. ) 
A. Plant pubescent to tomentose, not hispid. 

